CN116392624A

CN116392624A - Smoke and odor removing agent containing plant extracts and preparation method thereof

Info

Publication number: CN116392624A
Application number: CN202310550318.6A
Authority: CN
Inventors: 甘振顺; 张桐; 丁文鹏
Original assignee: Zhejiang Fengling New Material Technology Co ltd; Zhejiang Fengling Holding Group Co ltd
Current assignee: Zhejiang Fengling New Material Technology Co ltd; Zhejiang Fengling Holding Group Co ltd
Priority date: 2023-05-16
Filing date: 2023-05-16
Publication date: 2023-07-07

Abstract

The application discloses a smoke and odor removing agent containing plant extracts and a preparation method thereof, wherein the smoke and odor removing agent containing plant extracts comprises the following raw materials in parts by mass: 12-27 parts of plant extract; 15-25 parts of hollow porous silicon dioxide; 0.5 to 1.5 portions of surfactant; 50-60 parts of deionized water; the plant extract at least comprises 4-8 parts of citric acid-grapefruit flower extract. The plant extract can be loaded on the hollow porous silica, so that volatilization of the plant extract is slowed down, the plant extract can play a long-acting and lasting role in deodorizing, the citric acid-pomelo flower extract in the plant extract can remove smoke molecules in the air through an acid-base neutralization reaction, and meanwhile, the citric acid is mixed with the pomelo flower extract in a reaction manner, so that the volatility can be improved, and the daily smoke-removing effect is achieved.

Description

Smoke and odor removing agent containing plant extracts and preparation method thereof

Technical Field

The application relates to the field of deodorizing agents, in particular to a smoke deodorizing agent containing plant extracts and a preparation method thereof.

Background

The deodorizing agent is a substance capable of removing peculiar smell or flavor, and is widely used in life. The deodorant has the main function of removing or covering peculiar smell molecules in the air in a physical adsorption, chemical reaction or odor covering mode and the like, so that the environmental odor is improved. The types of deodorant commonly used at present are physical deodorant, chemical deodorant, biological deodorant and plant type deodorant. Wherein the physical deodorant is difficult to desorb after absorbing the odor molecules, can not be reused, the chemical deodorant is easy to cause secondary pollution to the environment, and microorganisms in the biological deodorant have certain adaptability and growth cycle and can not remove the odor rapidly.

The plant deodorant can remove odor molecules from the root source and can not cause harm to human bodies and the environment. However, the prior plant type deodorant has short duration of deodorizing effect and small application range, is mostly used for removing odor gas generated by thallus fermentation, and cannot effectively remove smoke smell.

Disclosure of Invention

In order to solve the problems that the plant type deodorant is easy to volatilize and has short lasting effect and can not remove smoke smell, the application provides a smoke removal deodorant containing plant extracts and a preparation method thereof.

In a first aspect, the present application provides a smoke and odor removing agent containing a plant extract, comprising the following raw materials in parts by weight: 12-27 parts of plant extract; 15-25 parts of hollow porous silicon dioxide; 0.5 to 1.5 portions of surfactant; 50-60 parts of deionized water; the plant extract at least comprises 4-8 parts of citric acid-grapefruit flower extract.

Preferably, the plant extract further comprises one or a combination of a plurality of shaddock peel extract, tea extract and shaddock flower extract.

Preferably, referring to the related preparation method in CN106563431a, the preparation process of the hollow porous silica is as follows:

the surface of the activated carbon is coated with silicon dioxide: adding active carbon into ultrapure water and a solvent, and stirring and mixing to obtain a solution A; adding methyl orthosilicate into absolute ethyl alcohol, and stirring and mixing the solution B; mixing the solution A and the solution B, stirring for reaction, and then carrying out reduced pressure distillation, drying and grinding to obtain the carbon-silicon dioxide.

Removing the interlayer carbon layer: and (3) placing the carbon-silicon dioxide in a muffle furnace at 400-600 ℃ for sintering for 5-6 hours, grinding after few sections, and obtaining the hollow porous silicon dioxide.

Preferably, the solvent is one or a combination of chloroform and acetone.

Preferably, the mass ratio of the activated carbon to the methyl orthosilicate is 300: (0.8-2).

Through adopting above-mentioned technical scheme, the particle of cavity porous silica is the cavity porous structure, exists a plurality of holes in the particle, and plant extract molecule can enter into the hole of cavity porous silica, and cavity porous silica surface contains abundant hydroxyl radical, plant extract can be connected with cavity porous silica through van der Waals' force and hydrogen bonding effect, plant extract is volatile, load through above-mentioned mode can effectively alleviate the volatilization of active ingredient in the plant extract in cavity porous silica for thereby plant extract can not just volatilize cleanly in the short time and lose the effect of getting rid of the peculiar smell, thereby reach long-term lasting effect.

The main sources of the peculiar smell are sulfur-containing compounds, ammonia-containing compounds, organic acid compounds and the like, the main active ingredients in the shaddock peel extract comprise naringin and limonoid, the main active ingredients in the tea extract comprise catechin, and the active ingredients are flavonoid compounds and can be combined with peculiar smell molecules to generate chemical reaction so as to neutralize the peculiar smell-generating compounds, convert various peculiar smell molecules into common molecules and solve the problem of peculiar smell from the source of peculiar smell, thereby achieving the effect of removing peculiar smell. Meanwhile, the main volatile active ingredients in the pomelo flower extract comprise nerolidol and farnesol, so that the pomelo flower extract has a certain sweet fragrance, and can mask peculiar smell, thereby achieving the effect of double peculiar smell removal.

Most of the smoke molecules in the smoke are alkaline, wherein nicotine is used as a main component in the smoke molecules, so that the smoke is bad in smell and can cause health hidden trouble to human bodies. The citric acid is acidic, and the citric acid-grapefruit flower extract can perform acid-base neutralization reaction with smoke molecules, so that the smoke molecules in the air can be effectively removed. Meanwhile, catechin in the tea extract can adsorb smoke particles dispersed in the air, so that smoke smell is eliminated to a certain extent.

Preferably, the extraction process of the shaddock peel extract, the tea extract and the shaddock flower extract is as follows: mashing plant raw materials, respectively adding the mashed plant raw materials into a solvent, uniformly mixing, and condensing and refluxing the mashed plant raw materials in a constant-temperature water bath at 80-95 ℃ to obtain a crude extract; the crude extract is filtered and distilled under reduced pressure, and then the distilled solution is extracted by an extractant to obtain plant extracts of corresponding plant raw materials respectively.

Preferably, the plant material comprises one or more of shaddock peel, tea and dried shaddock flower.

Preferably, the plant material is subjected to the above extraction process, and the extraction of the plant extract is performed separately.

Preferably, the solvent comprises one or more aqueous solutions of ethanol, methanol, acetone and ethyl acetate with the mass fraction of 5%.

Preferably, the extractant comprises one or more of chloroform, ethyl acetate and petroleum ether.

Preferably, the mass ratio of the solvent to the plant material is (15-25): 1, a step of; the mass ratio of the extractant to the plant raw materials is (10-20): 1.

preferably, the citric acid-grapefruit flower extract comprises the following components in percentage by mass: (1.5-2) and the raw materials of the grapefruit flower extract are reacted at 60-70 ℃.

By adopting the technical scheme, the citric acid and the smoke molecules are subjected to acid-base neutralization reaction, so that the smoke molecules can be effectively removed. However, citric acid is poor in volatility, and is difficult to volatilize into the air in the deodorant, so that smoke molecules in the air are neutralized. The nerolidol in the pomelo flower extract can be subjected to chemical reaction with citric acid, and the citric acid can be combined with the pomelo flower extract to effectively improve the volatility of the citric acid at normal temperature and normal pressure, so that the smoke smell in the air can be effectively inhibited.

Preferably, the preparation process of the citric acid-grapefruit flower extract comprises the following steps: mixing citric acid and the extract of the grapefruit flowers with deionized water uniformly, stirring and reacting under the water bath constant temperature condition of 60-70 ℃, and distilling to obtain the extract of the citric acid and the grapefruit flowers.

Preferably, the citric acid is lemon peel extract, and the preparation method comprises the following steps: the mass ratio is 1: mixing lemon peel (4.5-7) with deionized water, placing the mixture into a water bath kettle with the temperature of 65-75 ℃ for constant-temperature water bath for 1-2 hours to obtain a premix, carrying out suction filtration on the obtained premix to obtain filter residues and filtrate, repeating the water bath heating and suction filtration process on the filter residues for 2-3 times, mixing the obtained filtrate, and carrying out reduced pressure distillation to obtain the citric acid extract.

Preferably, the raw materials of the smoke removing and deodorizing agent further comprise 3-6 parts of nano titanium dioxide, wherein the nano titanium dioxide is modified nano titanium dioxide doped with metal ions.

Preferably, the metal ions comprise one or more of iron ions, manganese ions, copper ions and zinc ions.

More preferably, the metal ion is an iron ion, i.e., the modified nano-titania is an iron-doped nano-titania.

By adopting the technical scheme, the nano titanium dioxide has a photocatalysis effect and can catalyze part of plant extracts to decompose. The active substances in the plant extract are decomposed into small molecules from macromolecules through the photocatalysis effect, wherein the small molecular compounds comprise hydroxy-phenyl ketone compounds and the like, the odor removing effect can be achieved by neutralizing the odor molecules, meanwhile, the small molecular compounds have good diffusivity, the odor removing active molecules can be easily diffused into indoor air, and the application range of the odor removing agent is enlarged.

However, the photocatalysis of the nano titanium dioxide can only be excited by near ultraviolet light, sunlight can not be fully utilized, most of indoor ultraviolet light is shielded by buildings, and the photocatalysis effect of the nano titanium dioxide is weakened. The spectral response range of the nano titanium dioxide can be widened through metal ion doping modification, photocatalysis is widened from ultraviolet light to a visible light region, and the visible light activity of the nano titanium dioxide is improved, so that the nano titanium dioxide can effectively perform photocatalytic decomposition on plant extracts.

Preferably, the surfactant comprises one or more of tween, dodecyl chloride dipropionate and sodium dodecyl benzene sulfonate.

By adopting the technical scheme, the surfactant has diffusivity and permeability, so that the plant extract can enter the gaps of the hollow porous silica and is loaded on the hollow porous silica, and the volatilization of the plant extract is relieved.

Preferably, the particle size of the hollow porous silica is 150-250 nm; the particle size of the nano titanium dioxide is 10-25 nm.

Through adopting above-mentioned technical scheme, the hole of cavity porous silica is many, and the space is big, is favorable to the plant extract to carry out the load, and nanometer titanium dioxide particle diameter is little simultaneously, can get into inside the cavity porous silica through the hole of cavity porous titanium dioxide to the effect is with the plant extract of loading in inside the cavity porous silica, realizes the catalytic action. Thereby realizing the effect of relieving the volatilization of the plant extract and increasing the acting range of the deodorant.

In a second aspect, the present application provides a method for preparing a smoke and odor eliminating agent comprising a plant extract, comprising the steps of:

step 1: stirring and mixing the plant extract and part of deionized water to obtain a mixed solution;

step 2: adding the hollow porous silica and the nano titanium dioxide into the rest deionized water, stirring and dispersing, adding the mixed solution and the surfactant after uniformly mixing, and continuously stirring and mixing to obtain the smoke and odor removing agent containing the plant extract.

Preferably, the plant extract comprises 5 to 10 parts by mass of a shaddock peel extract, 2 to 6 parts by mass of a tea extract, 1 to 3 parts by mass of a shaddock flower extract and 4 to 8 parts by mass of a citric acid-shaddock flower extract composition.

In summary, the application has the following beneficial effects:

1. the smoke removing and deodorizing agent containing the plant extract can combine flavonoid active substances in the plant extract with odor molecules, neutralize the odor molecules and achieve the effect of deodorizing. Meanwhile, the plant extract can be loaded on the hollow porous silica, and is volatile, and the volatilization of the plant extract can be slowed down by loading the plant extract on the hollow porous silica, so that the plant extract can play a long-acting and lasting deodorizing role.

2. The smoke and odor removing agent containing the plant extract also comprises citric acid-grapefruit flower extract. The citric acid is an acidic substance, smoke molecules are alkaline, acid-base neutralization occurs between the citric acid and the smoke molecules, and the smoke molecules in the air can be effectively removed, so that the purpose of removing smoke is achieved. Meanwhile, the citric acid is combined with the compounds in the grapefruit flower extract in a reaction way, so that the volatility of the citric acid can be improved, and the citric acid can be volatilized into the air under the conditions of normal temperature and normal pressure, so that the smoke smell in the air is removed. Meanwhile, catechin in the plant extract can adsorb smoke particles dispersed in the air, so that smoke smell is eliminated to a certain extent.

3. The smoke removing and deodorizing agent containing the plant extract comprises nano titanium dioxide, and the nano titanium dioxide after metal doping modification can catalyze macromolecular compounds of the plant extract to decompose into micromolecular compounds under the condition of visible light, the micromolecular compounds can still keep the original effect of neutralizing peculiar smell molecules, and meanwhile, the diffusivity of the micromolecular compounds is high, so that the diffusion degree of the micromolecular compounds in the air is high, the action range of the smoke removing and deodorizing agent is increased, and the smoke removing and deodorizing effects are increased.

Detailed Description

Preparation example of hollow porous silica

Preparation example 1, a hollow porous silica, was prepared as follows:

adding 300g of active carbon into 10ml of chloroform, 5ml of acetone and 5ml of ultrapure water, stirring and mixing for 3 hours to obtain a solution A; 1g of methyl orthosilicate is dissolved in 15ml of absolute ethanol solution and stirred for 3 hours to obtain a solution B; mixing the solution A and the solution B, stirring and reacting for 5 hours, performing reduced pressure distillation after the reaction is finished, performing reduced pressure drying at 110 ℃ for 4 hours, and grinding to obtain the carbon-silicon dioxide.

And (3) placing the obtained carbon-silicon dioxide in a muffle furnace at 500 ℃ for sintering for 5.5 hours, and grinding after sintering to obtain the hollow porous silicon dioxide.

Wherein the D50 particle size of the hollow porous silica is 200nm.

Preparation example of iron-doped nano titanium dioxide

Preparation example 2, an iron-doped nano titanium dioxide, is prepared according to the following method:

mixing 20ml of absolute ethyl alcohol and 10ml of tetrabutyl titanate for 10min to obtain a mixed solution A; stirring 20ml of absolute ethyl alcohol and 25ml of glacial acetic acid for 10min, and uniformly mixing to obtain a mixed solution B; and (3) dropwise adding the mixed solution A into the mixed solution B under the condition of heating in a water bath at 40 ℃ and stirring to fully mix the solutions to obtain a mixed solution C.

0.7g of ferric nitrate nonahydrate is dissolved in 20ml of deionized water, then added into the mixed solution C in a dropwise manner, and the mixture is stirred for 2 hours under the condition of heating in a water bath at 35 ℃ and then dried for 24 hours in a drying box at 80 ℃. Taking out the powder, placing the powder in a muffle furnace at 500 ℃ for calcination for 3 hours, and grinding the powder after calcination to obtain the iron-doped nano titanium dioxide.

Wherein the D50 particle size of the iron-doped nano titanium dioxide is 20nm.

Preparation example of citric acid-grapefruit flower extract

Preparation example 3-1, a citric acid-grapefruit flower extract, was prepared as follows:

preparation of citric acid: weighing 100g of lemon peel, adding 600g of deionized water, putting into a water bath kettle at 70 ℃ for stirring and mixing, and heating in the water bath for 1h; and after stirring, carrying out suction filtration on the obtained solution to obtain filtrate and filter residue, adding 400g of deionized water into the filter residue, continuously stirring for 1h under the condition of water bath heating at 70 ℃, continuously carrying out suction filtration to obtain filtrate and filter residue, carrying out water bath heating and suction filtration on the obtained filter residue under the same condition, finally uniformly mixing the obtained filtrate, and carrying out reduced pressure distillation to obtain the citric acid.

Preparation of citric acid-grapefruit flower extract: adding 100g of citric acid and 180g of the grapefruit flower extract into 200g of deionized water, stirring and mixing for 2h under the water bath heating condition of 65 ℃, and distilling after stirring to obtain the citric acid-grapefruit flower extract.

Preparation example 3-2, a citric acid-grapefruit flower extract, was different from preparation example 3-1 only in that the addition amount of the grapefruit flower extract was 150g.

Preparation example 3-3, a citric acid-grapefruit flower extract, was different from preparation example 3-1 only in that the addition amount of the grapefruit flower extract was 200g.

Preparation examples 3-4, a citric acid-grapefruit flower extract, differed from preparation example 3-1 only in that the addition amount of the grapefruit flower extract was 100g.

Preparation example 3-5, a citric acid-pomelo flower extract, differs from preparation example 3-1 only in that citric acid does not react with the pomelo flower extract, and the mixture is uniformly mixed.

Preparation example of plant extract

Preparation example 4-1, a plant extract, was prepared as follows:

the preparation process of the shaddock peel extract comprises the following steps: cleaning fructus Citri Grandis, and peeling pericarpium Citri Grandis. Weighing 100g of shaddock peel, cutting into pieces, mashing, adding 2000ml of ethanol solution with mass fraction of 5%, mixing, and placing into a water bath kettle at 90 ℃ for condensation reflux for 2 hours to obtain crude extract; cooling the crude extract to room temperature, performing vacuum filtration, and distilling the obtained filtrate at 60 ℃; adding 1500ml chloroform into the distilled solution for three times for extraction, layering, and taking the upper layer solution to obtain the shaddock peel extract.

The preparation method of the tea extract comprises the following steps: weighing 100g of smashed tea, adding 2000ml of ethanol solution with mass fraction of 5%, mixing, and placing into a water bath kettle at 90 ℃ for condensation reflux for 2 hours to obtain crude extract; cooling the crude extract to room temperature, performing vacuum filtration, and distilling the obtained filtrate at 60 ℃; adding 1500ml of ethyl acetate into the distilled solution for three times for extraction, layering, and taking the upper layer solution to obtain the tea extract.

The preparation method of the grapefruit flower extract comprises the following steps: weighing 100g of dry grapefruit flowers, mashing, adding 2000ml of ethanol solution with mass fraction of 5%, mixing, and placing into a water bath kettle at 80 ℃ for condensation reflux for 2 hours to obtain crude extract; cooling the crude extract to room temperature, performing vacuum filtration, and distilling the obtained filtrate at 60 ℃; adding 1500ml chloroform into the distilled solution for three times for extraction, layering, and collecting the upper layer solution to obtain the extract of flos Citri Grandis.

Mixing 80g of pericarpium Citri Grandis extract, 40g of tea extract, 20g of flos Citri Grandis extract and 60g of citric acid-flos Citri Grandis extract prepared in preparation example 3-1 to obtain plant extract.

Preparation example 4-2, a plant extract, was different from preparation example 4-1 only in that 100g of the pomelo peel extract, 20g of the tea extract, 30g of the pomelo flower extract, and 80g of the citric acid-pomelo flower extract prepared in preparation example 3-1 were uniformly mixed to obtain a plant extract, and uniformly mixed to obtain a plant extract.

Preparation example 4-3, a plant extract, was different from preparation example 4-1 only in that 50g of the pomelo peel extract, 60g of the tea extract, 10g of the pomelo flower extract, and 40g of the citric acid-pomelo flower extract prepared in preparation example 3-2 were uniformly mixed to obtain a plant extract, and uniformly mixed to obtain a plant extract.

Preparation example 4-4, a plant extract, was different from preparation example 4-1 only in that the citric acid-grapefruit flower extract prepared in preparation example 3-3 was replaced with the citric acid-grapefruit flower extract prepared in preparation example 3-1 in an equivalent amount.

Preparation 4-5, a plant extract, differed from preparation 4-1 only in that the citric acid-grapefruit flower extract prepared in preparation 3-1 was added in an amount of 20g.

Preparation example 4-6, a plant extract, differed from preparation example 4-1 only in that the citric acid-grapefruit flower extract prepared in preparation example 3-1 was replaced with the citric acid-grapefruit flower extract prepared in preparation example 3-4 in equal amount.

Preparation example 4-7, a plant extract, differed from preparation example 4-1 only in that the citric acid-grapefruit flower extract prepared in preparation example 3-1 was replaced with the citric acid-grapefruit flower extract prepared in preparation example 3-5 in equal amount.

Preparation 4-8, a plant extract, differed from preparation 4-1 only in that no citric acid-grapefruit flower extract was added for mixing.

Examples

Example 1a smoke and odor eliminating agent containing a plant extract is prepared as follows:

200g of plant extract is added into 250g of deionized water and stirred and mixed to obtain a mixed solution;

200g of the hollow porous silica prepared in preparation example 1 and 50g of the iron-doped nano titanium dioxide prepared in preparation example 2 are added into 300g of deionized water, and after the mixture is stirred and mixed uniformly, the mixed solution and 10g of tween are added for continuous stirring, and the smoke and odor removing agent containing plant extracts is obtained through stirring and mixing.

Example 2 a smoke and odor eliminating agent containing a plant extract is prepared as follows:

200g of the hollow porous silica prepared in preparation example 1 and 50g of nano titanium dioxide are added into 300g of deionized water, and after the mixture is stirred and mixed to be uniformly dispersed, the mixed solution and 10g of tween are added to continue stirring, and the smoke and odor removing agent containing plant extracts is obtained through stirring and mixing.

Wherein the nano titanium dioxide is not modified by metal ion doping, namely the conventional nano titanium dioxide is adopted, and the D50 particle size is 20nm.

Examples 3 to 6 differ from example 1 only in the proportions of the raw materials used, as shown in Table I: table one formulation for example 1 and examples 3-6

Wherein example 3 was added with the plant extract obtained in preparation example 4-2; example 4 added is the plant extract prepared in preparation example 4-3; example 5 added is the plant extract obtained in preparation examples 4-4.

Example 7 a smoke suppressant containing a plant extract was different from example 1 only in that the plant extract obtained in preparation 4-1 was replaced with the plant extract obtained in preparation 4-5.

Example 8 a smoke suppressant containing a plant extract was different from example 1 only in that the plant extract obtained in preparation 4-1 was replaced with the plant extract obtained in preparation 4-6 in the same amount.

Example 9 a smoke and odor eliminating agent containing a plant extract was different from example 1 only in that the hollow porous silica obtained in preparation example 1 was added in an amount of 100g.

Example 10 a smoke suppressant containing a plant extract was different from example 1 only in that the iron-doped nano titanium dioxide prepared in preparation example 2 was added in an amount of 15g.

Example 11 a smoke and odor eliminating agent containing a plant extract was different from example 1 only in that the iron-doped nano titanium dioxide prepared in preparation example 2 was added in an amount of 80g.

Example 12 a smoke suppressant containing a plant extract was different from example 1 only in that the iron-doped nano titanium dioxide prepared in preparation example 2 was not added.

Comparative example

Comparative example 1a smoke suppressant containing a plant extract was different from example 1 only in that the plant extract obtained in preparation example 4-1 was replaced with the plant extract obtained in preparation example 4-7 in the same amount.

Comparative example 2 a smoke suppressant containing a plant extract was different from example 1 only in that the plant extract obtained in preparation example 4-1 was replaced with the plant extract obtained in preparation example 4-8 in the same amount.

Comparative example 3, a smoke and odor eliminating agent containing a plant extract, was different from example 1 only in that no hollow porous silica was added.

Performance test

1. Deodorizing test: the smoke and odor removal agents containing the plant extracts obtained in examples 1 to 12 and comparative examples 1 to 3 were tested for odor removal performance according to industry standard CJ/T516-2017 technical requirement for household garbage deodorizer, specifically, the removal rates of hydrogen sulfide, ammonia gas, methyl mercaptan and methyl sulfide.

Under the condition of normal temperature and normal pressure, the initial concentration is respectively 0.15mg/m ³ 15L of hydrogen sulfide gas, initial concentration of 1.5mg/m ³ 15L ammonia gas of (1) at an initial concentration of 0.1mg/m ³ 15L of methyl mercaptan gas and an initial concentration of 0.1mg/m ³ The 15L of the dimethyl sulfide gas was passed through a large bubble absorption tube containing 10ml of the smoke and odor eliminating agent containing plant extracts obtained in examples 1 to 12 and comparative examples 1 to 3, respectively, at a flow rate of 1L/min, and the treated gas was collected.

Then the concentration of hydrogen sulfide, the concentration of methyl mercaptan, the concentration of dimethyl sulfide and the concentration of ammonia in the treated gas are analyzed according to GB/T14678-1993 gas chromatography for measuring air quality hydrogen sulfide, methyl mercaptan, dimethyl sulfide and dimethyl disulfide and HJ 533-2009 Nahner reagent spectrophotometry for measuring ambient air and waste gas ammonia. The removal rate is calculated through the change of the concentration of the front gas and the back gas, so that the peculiar smell removal performance of the smoke removing and deodorizing agent is characterized.

The calculation formula of the removal rate is as follows:

c ₀ the concentration of the gas before treatment and the concentration of the gas after treatment are denoted by c.

The test results are shown in Table II.

2. Smoke removal test: at a volume of 2m ³ In the sealed box of (2), 10ml of the smoke and odor removing agent containing the plant extracts obtained in examples 1 to 12 and comparative examples 1 to 3 was placed, a beaker containing 10g of standard tobacco was placed in the sealed box, and the tobacco was ignited, and after the tobacco was burned out, the sealed box was left for 2 hours.

The conical flask containing 500ml of absolute ethyl alcohol is placed under a sealed cover, the gas in the sealed box is transferred into the absolute ethyl alcohol through a gas transfer vacuum pump, and the PH value of the absolute ethyl alcohol before and after the test is tested.

And meanwhile, a control group is arranged, namely, under the same conditions and test operation, no smoke and odor removing agent is placed in the sealing box, and the PH value of absolute ethyl alcohol before and after the test is tested.

The test results are shown in Table III.

3. Durability test: the initial concentration was set at 0.15mg/m ³ The hydrogen sulfide gas of the above experiment was passed through a large bubble absorption tube containing 10ml of the smoke and odor eliminating agent containing plant extracts obtained in examples 1 to 12 and comparative examples 1 to 3 at a flow rate of 0.2L/min, respectively, the treated gas was collected every 0.5h, and then the concentration of hydrogen sulfide in the treated gas was tested according to the test standard in test 1, until the concentration of hydrogen sulfide in the treated gas was similar to the initial concentration, the test was stopped, and the duration of the odor eliminating performance of the different samples was characterized by comparing the time taken when the concentration of hydrogen sulfide gas in the treated gas under the action of the different samples was similar to the initial concentration.

The test results are shown in Table IV.

Table II deodorizing test results

Table III smoke removal test results

Table four durability test results

According to the test results of each test in the tables two, three and four, in combination with the examples 1 and 2, it can be seen that the removal rate of the peculiar smell gas in the example 2 is slightly reduced compared with the example 1, the PH value of the deionized water after the smoke removal test is slightly improved, the duration time in the durability test is reduced compared with the example 1, and the deodorizing performance in the example 2 is reduced compared with the example 1, and the durability is reduced. The reason for this is probably that the nano titanium dioxide in example 2 is not modified by doping with metal ions, and the photocatalytic effect of the nano titanium dioxide is reduced, so that the number of the macromolecular active substances in the plant extract catalyzed into small molecules is reduced, and the diffusivity of the active substances for deodorizing in the plant extract is reduced, and the deodorizing performance is reduced.

In combination with example 1, comparative example 1 and example 8, it can be seen that the removal rate of the odor gas in comparative example 1 was reduced compared to example 1, the removal rate of the odor gas in example 8 was slightly changed compared to example 1, the PH of deionized water after the smoke removal test in comparative example 1 was significantly improved, the PH of deionized water after the smoke removal test in example 8 was improved, the duration of the smoke removal test in comparative example 1 and example 8 was not significantly changed compared to example 1, and it was demonstrated that the smoke removal performance of example 8 and comparative example 1 was significantly reduced compared to example 1, wherein the reduction of comparative example 1 was more pronounced. The reason for this may be that the amount of the added grapefruit flower extract in the preparation of the citric acid-grapefruit flower extract of example 8 was reduced to less than the minimum required range, citric acid did not react with the grapefruit flower extract in the preparation of the citric acid-grapefruit flower extract of comparative example 1, resulting in a decrease in the volatility of citric acid, and under the conditions of normal temperature and pressure, there was no synergistic effect with the grapefruit flower extract, the volatilization amount of citric acid was drastically reduced, resulting in a significant decrease in the smoke removal performance of example 8 and comparative example 1.

In combination with example 1, comparative example 2 and example 7, it can be seen that the removal rate of the odor gas in comparative example 2 was reduced compared to example 1, the removal rate of the odor gas in example 7 was slightly changed compared to example 1, the PH of deionized water after the smoke removal test in comparative example 2 was significantly improved, the PH of deionized water after the smoke removal test in example 7 was improved, the duration of the duration test in comparative example 2 and example 7 was slightly reduced compared to example 1, and it was demonstrated that the smoke removal performance of example 7 and comparative example 2 was significantly reduced compared to example 1, wherein the reduction in comparative example 2 was more pronounced. The reason for this may be that the amount of the citric acid-grapefruit flower extract added during the preparation of the smoke suppressant of example 7 was reduced to a level lower than the minimum value of the required range, whereas the citric acid-grapefruit flower extract was not added to comparative example 2. The citric acid can effectively remove the smoke smell according to the acid-base neutralization reaction with smoke smell molecules, the effect of the citric acid is lacked, and the smoke removal performance of the smoke removal agent is obviously reduced.

In combination with example 1 and example 12, it can be seen that the removal rate of the odor gas in example 12 is significantly reduced compared with example 1, the PH of the deionized water is slightly increased after the smoke abatement test, the duration time in the durability test is reduced compared with example 1, and the odor abatement performance in example 12 is significantly reduced compared with example 1, and the durability is reduced. The reason for this is probably that the iron-doped modified nano titanium dioxide for photocatalysis is not added in example 12, on one hand, the plant extract has no photocatalysis of nano titanium dioxide, the active substances of macromolecules cannot be decomposed and converted into the active substances of small molecules, the deodorizing efficiency is reduced, on the other hand, the substances of macromolecules have good diffusivity without small molecular compounds, and the action range is not as large as the small molecular compounds, so that the deodorizing performance of example 12 is obviously reduced.

In combination with examples 1, 10 and 11, it can be seen that examples 10 and 11 have a slightly lower odor removal rate than example 1, and examples 10 and 11 have a slightly higher PH of deionized water after the smoke removal test, and examples 10 and 11 have a lower duration than example 1, and examples 11 have a lower duration than example 1, indicating that examples 10 and 11 have a lower odor removal than example 1. The reason for this may be that the amount of the iron-doped modified nano titanium dioxide added in example 10 was reduced, and the photocatalytic effect of the nano titanium dioxide was reduced, so that the number of the large molecular active substances in the plant extract was reduced by catalysis into small molecules, and the diffusivity of the active substances for deodorizing in the plant extract was reduced, and the deodorizing performance was reduced. In example 11, the addition amount of the iron-doped nano titanium dioxide was increased, the catalytic effect on the plant extract was increased, the decomposition rate of the plant extract was increased, and the release of the active material was accelerated, so that the durability of the plant extract was reduced.

In combination with example 1, comparative example 3 and example 9, it can be seen that the removal rate of the odor gas in comparative example 3 was reduced compared to example 1, the removal rate of the odor gas in example 9 was slightly changed compared to example 1, the PH of deionized water after the smoke removal test of comparative example 3 and example 9 was slightly increased, the duration of the duration test of comparative example 3 was significantly reduced compared to example 1, the duration of the duration test of example 9 was significantly reduced compared to example 1, and the duration of example 9 and comparative example 3 was significantly reduced compared to example 1, wherein the reduction of comparative example 3 was more pronounced. The reason for this is probably that the amount of the hollow porous silica added in example 9 is smaller than the minimum value of the required range, and that the hollow porous silica is not added in comparative example 3. The system lacks hollow porous silica, so that the plant extract lacks a carrier, the volatility of the plant extract is good, the plant extract is free from the restraint of the carrier effect, and the plant extract is quickly diffused into the air, so that the durability of the smoke and odor removing agent is reduced.

In combination with example 1, examples 3 to 6, it can be seen that examples 3 to 6 have no significant changes in the removal rate of the odor gas, the PH of deionized water after the smoke removal test, and the duration in the duration test as compared with example 1, indicating that examples 3 to 6 have no significant changes in the smoke removal performance, and duration performance as compared with example 1. The reason for this is probably that the amounts of the raw materials added in the smoke suppressant were adjusted in examples 3 to 6 and were adjusted within the required ranges. The method shows that the dosage ratio of the raw materials is adjusted within the required range, and the deodorizing performance, the deodorizing performance and the durability of the prepared smoke removing agent are not obviously affected.

The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.

Claims

1. The smoke removing and deodorizing agent containing the plant extract is characterized by comprising the following raw materials in parts by weight:

12-27 parts of plant extract;

15-25 parts of hollow porous silicon dioxide;

0.5 to 1.5 portions of surfactant;

50-60 parts of deionized water;

the plant extract at least comprises 4-8 parts of citric acid-grapefruit flower extract.

2. The smoke and odor eliminating agent containing plant extract of claim 1 further comprising one or more of extract of pomelo peel, extract of tea leaf, extract of pomelo flower.

3. The smoke and odor removing agent comprising plant extract according to claim 2, wherein said extraction process of said pomelo peel extract, tea extract, pomelo flower extract is as follows: mashing plant raw materials, respectively adding the mashed plant raw materials into a solvent, uniformly mixing, and condensing and refluxing the mashed plant raw materials in a constant-temperature water bath at 80-95 ℃ to obtain a crude extract; the crude extract is filtered and distilled under reduced pressure, and then the distilled solution is extracted by an extractant to obtain plant extracts of corresponding plant raw materials respectively.

4. The smoke-removing and odor-removing agent comprising plant extract according to claim 1, wherein said citric acid-grapefruit flower extract comprises the following components in mass ratio of 1: (1.5-2) and the raw materials of the grapefruit flower extract are reacted at 60-70 ℃.

5. The smoke and odor eliminating agent containing plant extract of claim 4 wherein said citric acid-grapefruit flower extract is prepared by the process of: mixing citric acid and the extract of the grapefruit flowers with deionized water uniformly, stirring and reacting under the water bath constant temperature condition of 60-70 ℃, and distilling to obtain the extract of the citric acid and the grapefruit flowers.

6. The smoke-removing and odor-removing agent comprising plant extract according to claim 1, wherein said smoke-removing and odor-removing agent further comprises 3-6 parts of nano titanium dioxide, said nano titanium dioxide being modified nano titanium dioxide doped with metal ions.

7. The smoke-removing and odor-removing agent comprising plant extract of claim 6 wherein said metal ions comprise one or more of iron ions, manganese ions, copper ions, and zinc ions.

8. A smoke-removing and odor-removing agent comprising plant extract according to claim 1, wherein said surfactant comprises one or more of tween, dodecyl chloride dipropionate, and sodium dodecyl benzene sulfonate.

9. A smoke-removing and odor-removing agent comprising plant extract according to claim 1, wherein said hollow porous silica has a particle size of 150-250 nm; the particle size of the nano titanium dioxide is 10-25 nm.

10. The method for producing a smoke and odor eliminating agent containing a plant extract according to any one of claims 1 to 9, comprising the steps of: